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Straight Line Graphs

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Question 136

In 1960 the life expectancy in the UK was 71 years In 1975 the life expectancy in the UK was 73 years Given that the life expectancy in the UK n n\,n years after 1960 is x x\,x years,

a.

Using a linear model, show that an equation linking x x\,x with n n\,n is

x=215n+71 x = \frac{2}{15}n + 71 x=152​n+71
[3]
b.

In 2020 the life expectancy in the UK was 81.8 years. Comment on the suitability of your model in light of this information

[3]
Markscheme

Straight Line Graphs Questions

  1. A Level
  2. /Maths
  3. /Straight Line Graphs

260 exam-style questions on Edexcel A Level Maths Straight Line Graphs, covering 5.1 y = mx + c, 5.2 Equations of Straight Lines, 5.3 Parallel and Perpendicular Lines, 5.4 Length and Area, and 5.5 Modelling with Straight Lines. Each one has a worked solution and a mark scheme showing where the marks go.

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